Stop motion mechanism for narrow fabric looms



Dec. 14, 1948. w. PRUlTT 2,456,021,

STOP MOTION MECHANISM FOR NARROW FABRIC LOOMS 4 Sheets-Sheet l i 15 r\ I-/ Filed Aug. 51, 1946 Willi/l INVENTORL WILL/5 PRU/77f.

ATTORNEY.

Dec. 14, 1948.

w. PRUITT STOP MOTION MECHANISM FOR NARROW FABRIC LOOMS 4 Sheets-Sheet 2 Filed Aug. 31', 1946 INVENTQR. WILL/5 'PRUITT.

ATTORNEY,

Dec. 14, 1948. w. PRUITT STOP MOTION MECHANISM FOR NARROW FABRIC LOOMS 4 Sheets-sheaf Filed Aug. 31, 1946 INVENTOR. w/u/s P/ZU/TC' ATTOENEK Dec. 14, 1948. w. PRUITT STOP MOTION MECHANISM FOR NARROW FABRIC LOOMS 4 Sheets-Sheet 4 Filed Aug. 31, 1946 INVENTOR.

ATTORNEY Patented Dec. 14, 1948 STUFMOTIONMEGHANISM FOE NARROW FAZBRJIC LQ'OMSZ a willisePrui tt',.Attallti,,Ala.,.;assignorito'liawrenca Products .ob iAttalfi Alagafirm ApplicationaAugust Sl, 194 6'5 SerialiNo; 694,366!

invention: relates to: improvements in means: for: automa-tioaim stopping aaloom betore the filling or weft in the shuttle iseentirelyz ear-'- hausted; and: an primary); object; of the /invention iscto. provide efiioient, practical economicalaand automatic; mean-S for stopping at narrow? fabric loomsbeforeethecfilling or Weft in thefshuttletis exhausted; thus :preventing danger :of brokenor miss picksor weftthreads or preventingfunevem ness in'therfabric thereby producing a .-more;pera

fectiabric;w u

, V The:c'0ntin11ati0n .ofitheerunningeota loom with an:emptyrsshnttleszcauses damage to-or imperfec tions in therwoven-lfabnio and .alsoicauses. lessor. waste ofiiyarm. In narrow fabric. loomsiaiseries ot: shuttles.- arewsimultaneouslyz; operated to -pro-v dune a lplurality sof ribbons or other narrow fabrics; thus making observationsiregarding;exhause tion oi ithe thread :On "bhQLbGbbi-HS theishuttles more-difficult.-vv -Itiis; therefore; a fvurthers objectoisthepresent invention to provide.-electric-ston-motion for nar: row? fabric} loomstenabling; the. machine to..-stop automatically asisoon assthezwefit threadinone of theshuttlesis near:exhaustion.= I g It is a further object of the presenttinvention. to; provide .theshuttle-witlr acmetaiquili or: metalsunfacedo,uill, -so. that whenrthe- :yarm has about reached'its-ista'ge of exhaustion, electrical contact mam-be established with a device-brought into intermittent-contact withrthex bobbin: on quill. to close 2am electric circuit l controlling the-starting mechanismiof-t-heloomz- A It is anfurther objector-that present invention to equip conventional narrow fabric looms-with electric.stop-motionwithout requiring modificationon changethereof; a. still further object being; to provi-de automatic stop-.mot-iomwhicmmay readily; applied. 170:. conventional narrow-.- fabriclooms.

, These and other objects and; certain advantageousszfeatures are accomplished .bytheinevel-and practical; construction, combination and; arrange. ment of :parts. hereinafter disclosedtandillustrated in; the accompanying: drawings; constitutingaan es-sentiak part of.theadisclosure and :in which Figs 1, 2 and-3. are: diagrammatic front iv-iews. ofnthreerstages in. the operation ofa: narrow fab-- ric'loomzi. I v

' F1814 isia diagrammatic toplplan-view, showing; the relationship between the various essentiaiparts;,; in cluding, one :shuttle? andvv an empty, shuttle siolaimsl (c1.139f+ sm:

msittona fbl'lfiwOfihGL ifingenbeing hiddeniirom. View; andFigt5a isiamodification thereof.

- WEigG isiaicrosssectional:diagrammaticiview of the bobbin contact1finger;0f-.:Eig-. 5 in operative position;

Fig 7. 7*: iSu an; enlarged; planview of a shuttle,

bobbin and :contact fingers intpositiomh a v ,--,Figc his aa right handriend. view of 7.

- Figgflwis anzeleotricaihdiagram includingaaemodi-e f ediformyofiquilicontaotfinger; I :In tm 'aconventional narrow fabric! 100113; .a plus ralityy of shuttles aresimultaneouslyoperated: to pneducerar piuralityyof; ribbons .-or other narrow fabxicse Qnl-y' p'arts'of such a machine isishown inthe drawings;wavering; only the-Hessentialiparts oftheeinvention ,Referring to Figs: lsto 3::inclusive, the-illustrations disclose wal conventional narrow fabric loormi'havin t batten lito which are secured the support/$1115 f or; the; upper: and". lower: shuttle biooks tflr andl l8 nespeotively Thershuttles. l9 aEPgL1iI1ed==zwithinhtheseeshuttle blocks J1 and I 8 andtare moved ibyemeans 0f the :rack: 20 contactinggthegpinionsz-z tile-lower shuttle bloclal8v The uppen; portion ofi: the :pinion- .2] engages a rack portion: Main-1 the; shuttle: guidegroove 1. 2 3

- \-inoving of: theerack-lu--in=-thehdirectionwof thaarrow 24 wilhcause the ssh-uttle-i I alto; move imthe; directionof theiarrow 25;, th-eselmovements being thenn eversed,.thusweaving the narrowf abric in the ,conventionat-mannen; Inatheiinterest of-; clar-ity-,--v the-' contaot, fin'gerscandoleverstarenot showmin Figs? 1 to3 ggtoienring more: par-tioularly to the; top: plan view shown in 4, the Warp threads ZWv come iromggtheewarn beam 1 30: rotatablymounted. on the framework of themach-ine-and iaretthreaded thmough gthe reed 3.1. clampedtasindicatedat 32 toatheebatten l5. 1 The: harnesses 38,- -39:-(Eig. 2) reciprocate Fvertically-v in a conventional manner. *Ihe ebattenu li -is eadapted to rock .forwards --and baokward s by means of the connectingrodsifl connected totheicrank: shaft-55 Batten-I51 ins eludes; theeshuttletrack. 29. and the. supports I 6' to which; :are; secured: the slotted." shuttle blbck s lily lat '1 he rlower.-:blocle l 8 -.(Figs.. 1-3) rotatably 'oanricas thei pinion. Z-iin engagement with. the

shnttleiraokrlfl, I thoracic v2 firming-adapted; aspre-i viously, explained to; reciprocate longitudinally byg means o-t; the v strap "35 trained over. pulleys M535 ewhiohcin: turn are connected. to. av shuttle motiom'diiivemot shown). The: shuttles. l9 caaryingathiathread-[wound quills/J31. move back and forthiin accordance withothe movement of the batten l5 and then move longitudinally re. ciprocatingly in accordance with the movement of the rack 20 and in the shed formed between the two layers of V-formed intertwined warp between two adjacent shuttle blocks or holders I! and 58. During this longitudinal movement, a shuttle I9 slides, along a shuttle block SB (Fig. 4) through the warp shed across the warp threads and into an adjacent shuttle block SB. A layer of warp threads W carried by one gang of heddles (not shown) on one harness 38 is then movedby the latter relatively with respect to a layer of warp threads carried by a second gang of heddles (not shown) on another harness 39, one layer of warp threads meshing with the other layer of warp threads, holding the weft thread T wound on the quill 3'! and carried across by the shuttle l9 between the threads of the layers. Then the said shuttle l9 reverses in direction and returns to the first mentioned shuttle holder laying another weft across the forming fabric F, the direction of movements of the said harnesses 38 and 39 being reversed. This is conventional in narrow fabric looms.

According to this invention the quill 31 is made of metal or is provided with a metal surface.

Attached to loom breast beam B by screws 43 is a bracket 4| to which is hingedly connected by hinge 42 an electrical insulating plate or strip 43. Hinge 42 is secured to bracket 4| by bolts and nuts 42a and to plate 43 by bolts and nuts 4212. Plate 43 is provided with a pivot 44 to which is connected a rod 45, connecting the plate 43 to a cam lever 46. The lever 46 is hingedly connected to bracket 41. The bracket 41 in turn is secured to the loom breast beam B by means of bolts 48. The lever 46 has a roller or projection 49 at its opposite free end in engagement with a cam 50 mounted on the shaft 5|. A sprocket wheel 52 (Fig. 4) is also mounted on the shaft 5| connecting with another sprocket wheel 53 by means of the sprocket chain 54. The sprocket wheel 53 is secured to the loom crank shaft 55. Crank portions 56 of the crank shaft 55 are connected to the batten l5 by means-of rod or links'5l. It is evident, that the crank shaft 55 and the cam shaft 5| are driven inunison and that reciprocal or back and forth rocking motion is imparted to batten l5, while simultaneously radial up and down movement is imparted to plate 43 about the hinge 42.

, Secured to plate 43 in spaced relation are a pair of spring metal fingers 58. These fingers 58 each have a portion 53 disposed over the plate 43, a downwardly directed portion 60 disposed over the free end of the plate 43, and a rearwardly formed portion or feeler 6| disposed beneath the under face 62 of the plate 43.

The rearward portions or feelers 6! of the fingers 58 may each terminate in an upwardly directed portion 63. The forward parts of portion 59 pass through a retaining insulating block 64; Each portion 59 enters a slot or hole in stud 65, a set screw 66 maintaining electrical connection between each finger or feeler 58 and an electrical conductor 61 of cable 68. Studs 65 are secured to plate 43 by means of screws 69. As seen in Fig. 4, one of the wires 61 connects through a transformer and by conductor 61a to one terminal of the electromagnet H of a 110/6 volt relay (3, the other terminal of the electromagnet H being connected with the other wire 6'! of cable 68. The auxiliary contact 12 of relay 73 is connected to one terminal of a magnetic starter 14 by the wire 15. The control circuit stop side wire l6 connects another terminal of the magnetic starter 14 to the pivoted arm 11 of the relay 13. The leads and 76 connect with the motor leads 78 through the magnetic starter M. The relay and magnetic starter are conventional.

It is now evident that if the thread Ton quill 31 in a shuttle I9 is usedup to such an extent that surface metal portions 370. of the quill 3'! are exposed, then when the plate 43 comes down (see Figs. 5 and 6), the feelers SI of fingers 58 will contact these bare metal surface portions of the quill 3'! and thereby make an electrical connection between the two fingers 58 on plate 43. This will close the circuit which includes the transformer Hi and electromagnet H of the relay [3, thereby energizing the electromagnet H causing switch arm H to be attracted and moved away from auxiliary contact. 12, thus breaking the motor circuit controlled by the magnetic starter 14. After .the quill 31 has been replenished with thread, the machine is again started in conventional manner;

Although'it is preferable to employ two feelers 6| to indicate when another full quill is required, one feeler may be employed by grounding the metal quill or bobbin through the frame structure of the machine. Fig. 9 shows such a modified arrangement. In this latter case, the quill 31 may be grounded through conductor 61b and one terminal of the electromagnet in the relay may also be grounded through conductor 61c. Feeler Bla on hinged plate 43 connects with transformer 10 through conductor 61d.

It is evident that the stop-motion device is applicable to narrow fabric looms wherein the two adjacent shuttle blocks have slots which form portions of a continuous arc, a shuttle sliding from oneblock to the adjacent block laying one Weft or filling and then back layinganother weft or filling. The shuttle-defines an are as it slides from one shuttle'block to another. 'In this case it would benecessary to hingedly mount the plate 43 at "an angle so that the feelers may contact the metal quill after the shuttle has traversed its arcuatepath. 1

It is-thus seen that the present invention comprises simple, and practical stop-motion means for narrow fabric looms, which will be safe, efficient, and reliable in use and operation. The device comprises relatively few parts which may be inexpensively manufactured and assembled'and which is well adapted to accomplish, among others, allof the objects and advantages herein set forth. 4 r

In Fig. 5a, parts corresponding to those-seen in Fig.5; are indicated by the same numerals with the letter a affixed, except that, instead of the rod 45 and lever-43, there is seen an extension 45a of plate 43a.

"Without'further analysis the foregoing will so fully reveal the gist of the invention that others can by applying current knowledge readily adapt it for various applications without omitting certain features that from the standpoint of the prior art'fairly constitute essential characteristics of tli'egeneric or specific aspects of this invention, and, therefore, such adaptations should and are intended to be comprehended Within the meaning andrangeof equivalency of the following claims. V 1 Having thus described the invention, what is claimed as new and desired to be secured by Letters Paten t'is': I 1 Stop-motion for anarrow fabric loom hav- Q insistmagnetic:startere roviueaewitn "relayiin chirliltgsf aitransfornren, comprising wt-memben upon whiche weft threadef may: bee wound, -said member being -carriedc by the usual shuttle and beingz-adaptedi' to make an:electrical "contactgcan electrical insulating plate; r. m'eans hingedly connectingsaidplatestoithe rusuab loom breast beam,

a pair of electrical 'contact 'members carriedby electricat niaiecicontsct I pain o f' contacts tw said fie-lawn before the weft thread on said member is exhaustedi electrical conductors 'connectingonetier-- minal er the-low voltage side'of -said transformer to said relay, the other terminal of said low voltage side to one contact of said pair of electrical contacts, and the other contact of said pair of electrical contacts to said relay. 2. Stop motion for a narrow fabric loom having a magnetic starter provided with a'relay including a transformer, comprisin a member upon which weft thread may be wound, said member being carried by the usual shuttle and being adapted to make an electrical contact, an electrical insulating plate, means hingedly connecting said plate to the usual loom breast beam, electrical contact means carried by said plate and adapted for engagement with said member,- a cam lever, means hingedly connecting said lever to said breast beam, a rod pivotally connected to said plate and being attached to said lever, a shaft, a' sprocket wheelmounted on said shaft,

a sprocket wheel mounted on the usual loom crank shaft, a sprocket chain in engagement with said sprocket wheels, a cam on said firstmentioned shaft engaged bysaid lever whereby said electrical contact means is adapted'to intermit-- tently engage weft thread wound upon said member and to contact with said member before the weft thread on said member is exhausted, and electrical conductors connecting said electrical contact means with said transformer.

3. Stop motion for a narrow fabric loom having a magnetic starter provided with a relay. including a transformer, comprising a member upon which weft thread may befwound, said member being carried by the usual shuttle and being adapted to make an electrical contact, an insulating plate hingedly connected to the usual loom breast beam, a pair of electrical contact members'carried by said plate and adapted for engagement with said member, a cam lever hingedly connected to said breast beam, means pivotally connecting said plate to said lever, a shaft, means connecting said shaft to the usual loom crank shaft engaging said lever, a cam on said first-mentioned shaft, said cam being adapted to actuate said lever whereby said contact members intermittently engage weft thread would upon said member and contact with said member before the Weft thread on said member is exhausted, electrical conductors connecting one terminal. of the low voltage side of said transformer to said relay, the other terminal of said low voltage side to one contact of said pair of fastens-motion rem nmtiwrfabricxl'oonrthana ngr xmagneticistartenrpmvided:withtiazrelw m c'ludingi ar transformer; "comprising; Mimi-311mm upon wiiicirrweftttnread mans beawound, gsaidi m'embeniibe'in-g carried blp thei-usuaiishnttler-and beinge adaptedc tmmaketam electrical icontuctaaz suppotitu means-shm'gediy estimating: saidb sup a pontratmtheeusuainloom breastzi-rbeamp-ielectricali contactixlmeans-r carried: byrasaidr supports andi adapted.forengagement witlrsaimmembem:aicam: follower, mean-s hingedly connecting; saidifoliowen to saidebreastibeamgi anrodipwotaliyiconnectedifto sai'd plateianclibeixrg zattachedi toisaid follnwer; .si shaft}; means 'connentingsai'dishaft tc th usuaL loormicranlnshafifta cami on saiidi'lfirsiiamentioned" shaftieirgsgediby asaidifdlioweniwhereby saiilaeleca tricah'contaotimeansiisradaptedttc intemiiiitently' engage weftidzhrearl' wound upomsaidim'emher and: tut-contact: with i'satdcm'embes before; thei weft threadnonn saidzimemben issexhaustedt and-i: el'ece tricalocondnetorssconnectingrsaidrielectricalscon tests-means:withatmnsform ,i

5. Stop motion for a narrow fabric loom having electrical starting and stopping means, said stop motion comprising a memberupon which weft.

thread may be wound, said member being carried by the usual shuttle and being adapted to make an electrical contact, a support, means hingedly connecting said support to the usual loom breast beam, electrical contact means carried by said support and adapted for engagement with said member, cam engaging means, means hingedly connecting said cam engaging means to said breast beam, a rod pivotally connected to said support and being attached to said cam engaging means, a shaft, means connecting said shaft to the usual loom crank shaft, a cam on said first-mentioned shaft engaged by said cam engaging means whereby said electrical contact means is adapted to intermittently engage weft thread wound upon said member and to contact with said member before the weft thread on said member is exhausted, and means connecting said electrical contact means with said electrical starting and stopping means.

,6. Stop motion for anarrow fabric loom having electrical starting and stopping means, said stop motioncomprising a member upon which weft thread may be wound, said member being carried by the usual shuttle and being adapted to make an electrical contact, a support hingedly connected to the usual loom breast beam, electrical contact means carried by said support and adapted for engagement with said member, cam

. engaging means hingedly connected to said breast beam, a means pivotally connecting said support within-said cam engaging means, a shaft, means connecting said shaft to the usual loom crank I shaft, a cam on said first-mentioned shaft engaged by said cam engaging means whereby said electrical contact means is adapted to intermittently engage weft thread wound upon saidmember and to contact with said member before the weft thread on said member is exhausted, and means connecting said electrical contact means with said electrical starting and stopping means.

'7. Stop motion for a narrow fabric loom having electrical starting and stopping means, said stop motion comprising a member upon which weft thread may be wound, said member being carried by the usual shuttle and being adapted to make an electrical contact, a support hingedly connected to the usual loom. breast beam, said support carrying cam engaging means, electrical contact means carried" .by said. support and adapted for-engagement with saidmember, a shaft, means connecting said shaft to the usual 100m crank shaft, a cam on said first-mentioned shaft in engagement withsaid cam engaging means whereby saidelectrical contactmeans is adapted .to intermittently engage weft thread wound on said member and-to contact with said member before the weft thread on said member is-exhausted, and means connecting said electrical contact means with said electrical starting and stopping meanss c ,8. Stop motion for a narrow fabric loom having electrical starting and stopping means, said stop motion comprising a member upon whichweft thread may be wound, said member being carried by the usual shuttle and being adapted to make an electrical contact, a support swingably connected to the usual loom breast beam, electrical contact means carried by said support and adapted for engagement with said member, a shaft, means connecting said shaft to the usual loom crank shaft, acam and cam engagmg meansbetween said first-mentioned shaft and said support whereby to facilitate said electrical contact means to. intermittently engage weft thread wound on said member and to contact 3 with said memberbefore the weft thread on saidmember is exhausted, and means connect-h ing said electrical contact means with said electrical starting and stopping means.

- WILLIS PRUITT.

REFERENCES CITED The following references are of record in the file of this patent: 

